Source for rectangular RV a/c ducting

JoeChiOhki wrote:
Hey all, I'm having a bit of trouble locating a source for the narrow rectangular aluminum ducting that is used (usually in the ceilings for A/C units) in RV HVAC systems.

I'm in the process of restoring a 40 year old RV, and am adding a roof A/C unit. The used A/C unit I ended up obtaining is designed for ducted use (though it can be run with a straight down discharge), and since I already plan to take down the interior ceiling, and figured it would be a good time to route a duct line over into the nearby cabinets so I can add A/C ducting around the unit instead of just freezing us out in the dinette :).

Thanks!

Do you have the A/C discharge plenum specific to the A/C unit you obtained for ducted installation. Improper installation can cause all sorts of issues such as evap freezing up, poor cooling, etc. This includes very specific duct sizes and min number of registers again of a very specific size.

Larry